Technical Bulletin
SuperDuct Conventional Two-Wire Duct Smoke Detector
7
Caution:
Before cleaning the duct smoke detector, notify the
proper authorities that the fire alarm system is undergoing
maintenance and take steps to prevent the control panel from
responding to a false alarm.
Airflow
HVAC duct
Sampling
tube
Retainer
clip
Optic
plate
Optic
housing
Detector
housing
Figure 6: Detector cleaning diagram
To clean the duct smoke detector:
1. Remove the detector’s cover then power down the
detector by disconnecting the initiating device circuit
wiring.
2. Using a vacuum cleaner, clean compressed air, or a soft
bristle brush, remove loose dirt and debris from inside the
detector housing and cover.
Use isopropyl alcohol and a lint-free cloth to remove dirt
and other contaminants from the gasket on the detector’s
cover
3. Squeeze the retainer clips on both sides of the optic
housing then lift the housing away from the printed circuit
board.
4. Gently remove dirt and debris from around the optic plate
and inside the optic housing.
5. Replace the optic housing and detector cover.
